Seeing as Black History Month is winding down, and I still have some leftover 2015 photos to share, this tattoo seems appropriate as February comes to a close:I spotted this tattoo of Huey Freeman, from the comic strip The Boondocks, on the arm of Netty, at last June’s Urban Tattoo Convention in Brooklyn.What’s remarkable about this tattoo is that it’s not all tattoo. Netty explained that she had the tattoo inked around her birthmark. Look again:Huey’s hair is mostly birthmark. She credited…